<html>
    <head>
        <meta charset="utf-8">
        <style>
            *{
                margin: 0;
                padding: 0;
                border: 0;
                
            }
            html{
                width: 100%;
                height: 100%;
            }
            .container{
                width: 450px;
                margin-left: 100px;
                margin-top: 100px;
            }
            .container> .content{
                height: 80px;
                width: 450px;
                background-color: #66ccff;
                margin-top: 10px;
                border-radius: 6px;
                }
              
             .container> .content:first-child{
                 margin-top: 0px;
                 
             }
            
        </style>
    </head>
    <body>
        <div class="container">
            <div class="content"> </div>
            
                
           
        </div>
        <script src=""
        <script src="myscript.js">
            
        </script>
    </body>
    
</html>